46 Technical Data/Test Values and Brake Wear Limits

WM 4600TW Technical data/test values and brake wear limits

Technical values









Technical values

Technical data for Cayenne 17" brake system (V6)





Test values/wear limits for Cayenne 17" brake system (V6)

Information

Depending on the extent of wear on cast iron brake discs, two condition criteria can make replacement necessary:

- Formation of cracks at advanced stage on the brake disc friction surfaces.

- Minimum brake disc thickness is not retained due to wear (material erosion due to friction). -> 46500200 Checking front brake discs (wear assessment) 46500200 Checking Front Brake Discs (Wear Assessment)-> 46530250 Checking rear brake discs (wear assessment) 46530250 Checking Rear Brake Discs (Wear Assessment)





Possible complaints
- Damage due to lack of use (rusting). This causes vibrations in the steering wheel, noises and brake pedal pulsation.
- Brake disc becomes distorted as a result of serious driving.
- Too much lateral runout when new brake discs are fitted on dirty or distorted wheel hubs.

Procedure
- Check brake disc for cracks, minimum thickness, lateral runout, thickness tolerance, flatness and surface roughness.
- If necessary, (depending on the actual brake disc thickness and the brake disc wear limit) machine the brake disc using one of the disc brake dressing machines approved by Porsche. For a list of recommended disc brake dressing machines, see Tools and Equipment.
- The brake disc must only be reworked symmetrically, i.e. evenly from both sides. Observe the operating instructions for the disc brake dressing machine.